Improved coupling for pump-rods



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@anni 1. A. DEWAR, D. S. S'MITH, AND R. A BRASHE'AR-.OF FRANKLIN.

PENNSYLVANIA.

Leners Patent No. 90,935, dated Jons, 1869'.

IMPROVED C OUPLING- POR PUMRDDS.

y The Schedule referred to in these Letters Patent and making part of the lame.

To all whom it 'may concern:

, showing the inside construction.

Fig. l represents the male coupling, and is constructed of a socket of iron, or other metal, with a screw at4 F, a square wrench-seat at C, to hold the same, with a wrench when coupling.

The inside of the socket is of larger diameter at the end D than B B, and is constructed'with corrugations or teeth 1, 2, 3, 4, 5, on 'the inner surface thereof.

E is the wedge of wood' or metal inserted into the end of the pump-rod A.

tact with D, the wedge is driven'into the rod A, which is separated and forced into the corrngations l, 2, 3, 4, 5, thereby holding tbe rod securely in the socket;-

Fig. 2 is the female coupling, and is constructed like iig. 1 in every respect,.otl1er than it is the female screw, while g. 1 is the male.

What we claim as our invention, and desire to secure by Letters Patent of the United States, is`

The rod A, socket B B, eorrugations 1, 2, 3, 4, 5, and the wedge E, when construetedias described for the purposes-set forth. I. W. DEWAR. D. S. SMITH. R. A. BRASHEAR.

Witnesses: A. B. RICHMOND,

Ro RElsINGEn.

.lhe rod is then driven intov the socket B B, and when the wedge E comes in con- 

